61934616791 has 4 divisors (see below), whose sum is σ = 61935688584. Its totient is φ = 61933545000.

The previous prime is 61934616761. The next prime is 61934616803. The reversal of 61934616791 is 19761643916.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61934616791 - 2³⁰ = 60860874967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61934616701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443960 + ... + 566541.

It is an arithmetic number, because the mean of its divisors is an integer number (15483922146).

Almost surely, 2^61934616791 is an apocalyptic number.

61934616791 is a deficient number, since it is larger than the sum of its proper divisors (1071793).

61934616791 is a wasteful number, since it uses less digits than its factorization.

61934616791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071792.

The product of its digits is 1469664, while the sum is 53.

The spelling of 61934616791 in words is "sixty-one billion, nine hundred thirty-four million, six hundred sixteen thousand, seven hundred ninety-one".